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Signals and Systems by Smarajit Ghosh

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SHORT QUESTIONS AND ANSWERS

 

Q1. What do you mean by z-transform of the discrete signal x(n)?

Ans.: The z-transform of discrete time signal x(n) and it is given by

 

image

 

where z is the complex variable and the z-transform of x(n) is also represented by the operator Z i.e.,

 

X(z) = Z[x(n)]

 

Here X(Z) and x(n) are known as z-transform pair which is represented as

 

image

 

Q2. What do you mean by Region of Convergence?

Ans.: The region of convergence are the values of z for which the z-transform converges. Eq. (6.1) shows that z-transform is an infinite ...

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